€66 Cheap Flights St. Louis to Chicago (STL-CHI)

View €66 flight on Wed, 21 Jan 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Chicago

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Cheap flights from St. Louis to Chicago (STL-CHI)

Prices were available within the past 7 days and start at €66 for one-way flights and €138 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, 14 Feb - Tue, 17 Feb
STL
St. Louis
ORD
Chicago
€138 Return, found 6 days ago
€138
Return
found 6 days ago
Select American Airlines flight, departing Sat, 14 Feb from St. Louis to Chicago, returning Tue, 17 Feb, priced at €138 found 6 days ago
American Airlines
Thu, 5 Feb - Mon, 9 Feb
STL
St. Louis
ORD
Chicago
€146 Return, found 4 days ago
€146
Return
found 4 days ago
Select American Airlines flight, departing Thu, 5 Feb from St. Louis to Chicago, returning Mon, 9 Feb, priced at €146 found 4 days ago
American Airlines
Sat, 31 Jan - Mon, 2 Feb
STL
St. Louis
ORD
Chicago
€147 Return, found 4 days ago
€147
Return
found 4 days ago
Select American Airlines flight, departing Sat, 31 Jan from St. Louis to Chicago, returning Mon, 2 Feb, priced at €147 found 4 days ago
Delta
Wed, 11 Feb - Wed, 18 Feb
STL
St. Louis
ORD
Chicago
€147 Return, found 6 days ago
€147
Return
found 6 days ago
Select Delta flight, departing Wed, 11 Feb from St. Louis to Chicago, returning Wed, 18 Feb, priced at €147 found 6 days ago
Delta
Sat, 14 Feb - Tue, 17 Feb
STL
St. Louis
MDW
Chicago
€155 Return, found 6 days ago
€155
Return
found 6 days ago
Select Delta flight, departing Sat, 14 Feb from St. Louis to Chicago, returning Tue, 17 Feb, priced at €155 found 6 days ago
Delta
Sat, 14 Feb - Tue, 17 Feb
STL
St. Louis
ORD
Chicago
€155 Return, found 6 days ago
€155
Return
found 6 days ago
Select Delta flight, departing Sat, 14 Feb from St. Louis to Chicago, returning Tue, 17 Feb, priced at €155 found 6 days ago
Delta
Sat, 31 Jan - Mon, 2 Feb
STL
St. Louis
MDW
Chicago
€162 Return, found 6 days ago
€162
Return
found 6 days ago
Select Delta flight, departing Sat, 31 Jan from St. Louis to Chicago, returning Mon, 2 Feb, priced at €162 found 6 days ago
United
Sat, 14 Feb - Tue, 17 Feb
STL
St. Louis
ORD
Chicago
€165 Return, found 6 days ago
€165
Return
found 6 days ago
Select United flight, departing Sat, 14 Feb from St. Louis to Chicago, returning Tue, 17 Feb, priced at €165 found 6 days ago
Delta
Thu, 29 Jan - Mon, 2 Feb
STL
St. Louis
ORD
Chicago
€173 Return, found 11 hours ago
€173
Return
found 11 hours ago
Select Delta flight, departing Thu, 29 Jan from St. Louis to Chicago, returning Mon, 2 Feb, priced at €173 found 11 hours ago
American Airlines
Sat, 14 Feb - Tue, 17 Feb
STL
St. Louis
ORD
Chicago
€173 Return, found 6 days ago
€173
Return
found 6 days ago
Select American Airlines flight, departing Sat, 14 Feb from St. Louis to Chicago, returning Tue, 17 Feb, priced at €173 found 6 days ago

Find the cheapest month to fly from St. Louis (STL) to Chicago (CHI)

August is typically the cheapest month to fly

From €65 - €264 per traveller.
St. Louis to Chicago route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
O'Hare Intl.
Return price
€138
Distance
413 km

Perfect flights from St. Louis to Chicago

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from St. Louis to Chicago. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Lambert-St. Louis Intl. to CHI-All Airports ticket options cater to your travel preferences, with incredible one-way fares from €66 and roundtrip prices from €138. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at CHI-All Airports and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Chicago.

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to Chicago, IL (CHI-All Airports)?
The lowest price advertised for a round-trip journey from Lambert Field to Chicago, IL (CHI-All Airports) is €138. But you better act soon. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to Chicago, IL (CHI-All Airports)?
The majority of flights can be cancelled online, but each air carrier has different terms and conditions. If you do have to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from STL to Chicago, IL (CHI-All Airports) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert-St. Louis Intl. Airport (STL) to Chicago, IL (CHI-All Airports) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from STL to Chicago, IL (CHI-All Airports)?
With a flight distance of 400 kilometres, it's only a hop from Lambert Field to Chicago, IL (CHI-All Airports). It might be a quick journey, but it's still worth packing something to keep you entertained on board.
Which airlines fly direct from Lambert Field to Chicago, IL (CHI-All Airports)?
Southwest Airlines (WN) is one of the top choices for travellers jetting between STL and Chicago, IL (CHI-All Airports). Choose from the 208 flights it offers on this route each month. United Airlines (UA) is another popular choice. It operates 208 flights per month. Between these two airlines, you'll be able to find a good deal from St. Louis to Illinois.
Are STL to Chicago, IL (CHI-All Airports) flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can occasionally score a bargain, with some super cheap fares from Lambert Field to Chicago, IL (CHI-All Airports) popping up a few weeks prior to the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals frequently — as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines advertise prices so far in advance.

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